16920953 has 4 divisors (see below), whose sum is σ = 19338240. Its totient is φ = 14503668.

The previous prime is 16920901. The next prime is 16920979. The reversal of 16920953 is 35902961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16920953 - 2¹² = 16916857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16920983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208633 + ... + 1208646.

It is an arithmetic number, because the mean of its divisors is an integer number (4834560).

Almost surely, 2^16920953 is an apocalyptic number.

It is an amenable number.

16920953 is a deficient number, since it is larger than the sum of its proper divisors (2417287).

16920953 is an equidigital number, since it uses as much as digits as its factorization.

16920953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417286.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 16920953 is about 4113.5085997236. The cubic root of 16920953 is about 256.7290062403.

The spelling of 16920953 in words is "sixteen million, nine hundred twenty thousand, nine hundred fifty-three".